%0 Journal Article %A Soogil Seo %T On first layers of $\mathbb{Z}_p$-extensions II %J Acta Arithmetica %D 2011 %P 385-397 %V 150 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa150-4-4/ %R 10.4064/aa150-4-4 %G en %F 10_4064_aa150_4_4